The pair in which both the species have the same magnetic moment (spin only value) is :

An excess of potassium ions makes KCl crystal appear violet or liliac in colour since:
(A) Some of the anionic sites are occupied by an unpaired electron
(B)Some of the anionic sites are occupied by a pair of electrons
(C) There are vacancies at some anionic sites
(D)F-ntres are created which impart colour to the crystals.
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The elevation in boiling point will be maximum in

hen a mixture of \(K _2 Cr _2 O _7\) and NaCl is warmed with concentrated \(H _2 SO _4\), red vapours of \((A)\) are evolved, which turn NaOH yellowish due to formation of compound (B). A and B respectively are:

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When a metal is placed in a solution of its ions, the metal can lose electron and can go in the solution as ion or the metal ion in the solution can take electron from the electrode and get deposited as metal. Thus, the electrode acquires either positive or negative charge with respect to the solution leading to the development of a potential difference between the metal electrode and the solution. This potential difference is called the electrode potential of the metal. The electrode potential of a metal is a measure of relative tendency to undergo oxidation (loss of electron) or reduction (gain of electron). When the concentration of the ions in the solution is unity, the electrode potential is called standard electrode potential. The magni of potential depends upon the nature of electrode, concentration of ions in solution and the temperature. In a galvanic cell, the electrode at which oxidation occurs is known as anodic half-cell and the electrode at which reduction occurs is known as cathodic half cell. The emf of the cell in terms of standard reduction potential is given by \(E_{\text {cell }}^{\circ}=E_{\text {cathode }}^{\circ}-E_{\text {anode. }}^{\circ}\).The standard free energy change of the redox reaction taking place in the cell is related to \(E_{\text {cell }}^{\circ}\) by \(\Delta G^{\circ}=-n F E^{\circ}\). A redox reaction would occur spontaneously if the free energy change is negative. The equilibrium constant of the reaction is related to the standard free energy change by \(\Delta G^{\circ}=-R T \ln K\).
The standard reduction potential of Zinc is represented by the reaction

Nitrogen containing compounds are basic in nature & their basic strength depends on ease of availability of lone pair of electrons on nitrogen atoms. For the following nitrogen containing compounds what will be correct order of basicity?

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From the statements given below, choose the correct statement regarding the galvanic cell.

If \(\sin ^{-1} x+\sin ^{-1} y=\frac{2 \pi}{3}\), then the value of \(\cos ^{-1} x+\cos ^{-1} y\) is:

What is the product of reduction of Nitriles with Lithium Aluminium Hydride?

The equation of trend line for five years (2004-2008) for the profit of a company is \(y_t=150+8 x\)The predicted profit for the year 2011 is:

Arrange the following in increasing number of quantum number when coming from excited energy state:
A. Lyman Series
B. Balmer Series
C. Paschen Series
D. Brackett Series
E. Pfund Series
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Match List-I with List-II

List-I (Terms)	List-II (Explanation)
(A) Secondary productivity	(I) The amount of biomass or organic matter produced per unit area over a time period by plants
(B) Net primary productivity	(II) The rate of formation of new organic matter by consumers
(C) Gross primary productivity	(III) The available biomass for the consumption to heterotrophs (herbiviores and decomposers)
(D) Primary production	(IV) The rate of production of organic matter during  photosynthesis

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The correct shape \(\&\) hybridisation for \(XeF_2\) are: